Finding the Fourth Proportional to 76,792.72, 105,980.12 and 42,812.21

Step by Step Solution

1. Step 1: Write the proportion equation
   76,792.72 : 105,980.12 = 42,812.21 : x
2. Step 2: Convert to fraction form
   76,792.72/105,980.12 = 42,812.21/x
3. Step 3: Cross multiply
   76,792.72x = 105,980.12 × 42,812.21
4. Step 4: Simplify right side
   76,792.72x = 4,537,243,153.27
5. Step 5: Solve for x
   x = 4,537,243,153.27/76,792.72
6. Step 6: Final answer
   x = 59,084.29